CN106589363A - Preparation method and application of polyaniline-W-type strontium ferrite composite material - Google Patents
Preparation method and application of polyaniline-W-type strontium ferrite composite material Download PDFInfo
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- CN106589363A CN106589363A CN201611202756.XA CN201611202756A CN106589363A CN 106589363 A CN106589363 A CN 106589363A CN 201611202756 A CN201611202756 A CN 201611202756A CN 106589363 A CN106589363 A CN 106589363A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/02—Polyamines
- C08G73/026—Wholly aromatic polyamines
- C08G73/0266—Polyanilines or derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/32—Radiation-absorbing paints
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2265—Oxides; Hydroxides of metals of iron
Abstract
The invention discloses a preparation method and application of a polyaniline-W-type strontium ferrite composite material, and belongs to the technical fields of wave absorbing material preparation and application. According to the method, the polyaniline-W-type strontium ferrite composite material is prepared by taking aniline and W-type strontium ferrite as raw materials through an in-situ polymerization method. The preparation method has the advantages that on one hand, the defect of non-uniform mixing brought by a mechanical mixing method can be overcome, and on the other hand, organic combination of dielectric loss and magnetic loss (polyaniline is a high-dielectric-loss material, and the W-type strontium ferrite composite material is a high-magnetic-loss material) can be achieved; in addition, polyaniline is a high polymer material, and then the purpose that the material is light can be achieved. The composite material has the advantages of being broadband, light and efficient by serving as an absorbing agent of a wave absorbing coating, and therefore a good application prospect is achieved.
Description
Technical field
The invention belongs to the preparation of absorbing material and applied technical field, and in particular to a kind of wideband, lightweight, efficiently inhale ripple
The preparation method of absorbed agent and performance study.
Background technology
With the fast development of modern science and technology, the search of stealth technology system of defense and the ability of tracking lock target are significantly
Improve, this causes serious threat for traditional military equipment, in order to improve existence and the operational efficiency of military equipment, hidden
The research of stature material all receives common concern in countries in the world.Meanwhile, it is along with the increasingly raising of living standard, more and more
Electronic product also entered into huge numbers of families, various electrical equipments while comfortable facility is brought, also to ours
Living environment causes substantial amounts of electromagnetic radiation and interference, is chronically at very big to the health hazards of human body under this environment.In the people
With stealth material is applied on facility, using absorption loss function of the stealth material to electromagnetic wave, environment electromagnetics can be substantially reduced
Injury of the pollution to human body, therefore, weigh very much for the research and development of stealth material all has on military and civilian field
The meaning wanted.
Stealth material is otherwise known as absorbing material, before the fields such as radar, space flight, microwave communication are all widely used
Scape.The function of absorbing material be can the electromagnetic wave that projects on material of attenuation by absorption, and electromagnetic wave energy is converted to into heat energy
And dissipate and consume, so as to reduce the reflection of electromagnetic wave, reach stealthy effect.Absorbing material can be divided into structure by the difference of its function
Two kinds of type and application type.Structural absorbing mater ials are typically dispersed in absorbent by shape in the enhanced structural material of special fibre
Into structural composite material, it has the dual-use function carried with electromagnetic wave absorption concurrently；And the absorbing material of application type is by absorbent
Target surface is coated on after mixing with adhesive and forms microwave absorbing coating.Comparatively speaking, the absorbing material easy construction of application type
Flexibly, material property is easily dimmable, absorbent properties are good, and cost of manufacture is cheap, is particularly suitable for the more complicated object of profile,
Therefore, with very big development prospect.
For the quality of application type absorbing material, it is absorbent to play a decisive role, therefore, absorbent becomes absorbing material
Research emphasis.Conventional suction agent material has obtained certain research and application at present, but traditional absorbing material has density
Larger, loss mechanism is single, the shortcoming that absorption band is narrower, it is difficult to meet modern radar absorbing material " thin, light, wide, strong "
Require comprehensively.Absorbent mainly has dielectric and magnetic loss two ways to the loss mechanism of electromagnetic wave, and single absorbent is often
Only there is a kind of drain performance, using Electromagnetic heating, it is possible to achieve two kinds of losses are complementary to one another, strengthen and impedance matching, are expected to
The absorbent of excellent.
The content of the invention
To overcome the deficiencies in the prior art, the present invention to prepare polyaniline/W type strontium ferrite composite woods using in-situ compositing
Material, to the material can as a kind of wideband, lightweight, efficient absorbing material absorbent.
The present invention is achieved by the following technical programs.
A kind of preparation method of polyaniline/W type strontium ferrite composites of the present invention, specifically includes following steps：
1) 10.18g～61.02g W type strontium ferrite powder, 0.4g silane couplers are weighed respectively, measure 100ml respectively
Concentration is that 1mol/L hydrochloric acid and 6.65ml aniline liquid are put in three-neck flask, after mix homogeneously, is stirred for 20～30 minutes.
2) 8.3g (NH are weighed4)2S2O8It is placed in conical flask, the hydrochloric acid that 36ml concentration is 1mol/L is dissolved in ice-water bath
In solution, the flow velocity of funnel is adjusted so that (NH4)2S2O8Hydrochloric acid solution dripped off in 30～40 minutes, after dripping off, in frozen water
Reaction is further continued in bath 4～10 hours.
3) pour product in buchner funnel vacuum filtration after completion of the reaction, successively with hydrochloric acid solution and alcohol washing solution
Clarify to filtrate, filter cake is taken out after filtration and is put into vacuum drying oven, be dried 20～24 hours at 60 DEG C, then will be dried
Composite granule grind into powder sieves to obtain polyaniline/W type strontium ferrite composites.
The concrete preparation method of above-mentioned W types strontium ferrite powder is：
Pure Sr (NO will be analyzed3)2、Fe(NO3)3·9H2O、Co(NO3)2·6H2O presses SrCo2Fe16O27Stoichiometric proportion is complete
CL adds a certain amount of citric acid as complexant, wherein metal ion in a beaker for filling appropriate distilled water:Lemon
Lemon acid=1:1 (mol ratio), is sufficiently stirred for being completely dissolved which, is added dropwise over ammonia, adjusts pH value to neutrality, in 80 DEG C of water-baths
Under the conditions of stir to solution and become the colloidal sol with certain viscosity and mobility, then colloidal sol is obtained into porous in 110 DEG C of dryings
Xerogel, abrasive gel are powdered, and powder is placed in crucible first after 450 DEG C of pre-burning 3h, after then heating to 1250 DEG C
Continue insulation 2h, sample naturally cools to room temperature with stove.
The present invention relates to primary chemical equation it is as follows：
Fe2O3+SrO→SrFe2O4(spinel-type) (1)
SrFe2O4+5Fe2O3→SrFe12O19(M types) (2)
SrFe12O19+2Fe2O3+2CoO→SrCo2Fe16O27(W types) (3)
Above-mentioned polyaniline/W type strontium ferrite composites can be applied on antiradar coatings as absorbent.
Compared with prior art, the present invention has following technique effect：
1st, in-situ compositing of the present invention is compared with mechanical mixing, with mix homogeneously, good dispersion it is excellent
Gesture.
2nd, the present invention can realize that (polyaniline is high dielectric loss material, W type strontium ferrite composite woods for dielectric and magnetic loss
Material is high magnetic loss consumption material) organic composite.Additionally, polyaniline is macromolecular material again, it is possible to achieve the purpose of material lightweight.
3rd, present invention institute using polymer-based composite absorber compared with single absorbent with wideband, lightweight, efficient
Advantage.
4th, the invention provides the modified new method of a kind of process is simple, low cost, the method is adapted to a large amount of processabilities
The composite absorber of excellent antiradar coatings.
Description of the drawings
Fig. 1 is the XRD spectrums under room temperature；
Wherein：(A) single W types strontium ferrite composite, (B) polyaniline/W type strontium ferrite composite granule (embodiments 3
Prepare).
Fig. 2 is the SEM of the polyaniline/W type strontium ferrite composite granules as absorbent coating of the preparation of the embodiment of the present invention 3
Image.
Fig. 3 is electrical conductivity of the different quality than obtained polyaniline/W type strontium ferrite composite granules；
Wherein：A, B, C, D, E are respectively pure polyaniline and the polyaniline/W types strontium ferrite of the preparation of embodiment 1～4 is multiple
Close powder body.
Fig. 4 is the absorbing property of the polyaniline/W type strontium ferrite composite granules as absorbent of different quality ratio；
Wherein：A, B, C, D, E, F are respectively polyaniline/W type strontium ferrite composite granules, single prepared by embodiment 1～4
W types strontium ferrite and single doped hydrochloride polyaniline.
Specific embodiment
Below in conjunction with the drawings and specific embodiments in detail the present invention is described in detail, but the present invention is not limited to following embodiments.
Embodiment 1
First the three-neck flask of 250ml is arranged on magnetic stirring apparatuss, and it is constant with ice-water bath keeping temperature, then to burning
100ml concentration 1mol/L hydrochloric acid solutions, 6.65ml aniline, 10.18gW type strontium ferrite powder (aniline are sequentially added in bottle:W type strontiums
Ferrite mass ratio is 1:9) and 0.4g silane couplers, magnetic agitation 30 minutes.Weigh 8.3g (NH4)2S2O8It is placed in conical flask
In, it is dissolved in ice-water bath in the hydrochloric acid of 36ml1mol/L, dissolves (NH after finishing4)2S2O8Hydrochloric acid solution pour into normal pressure leakage
Bucket, adjusts the flow velocity of funnel so that (NH4)2S2O8Hydrochloric acid solution dripped off in 30 minutes.After solution is dripped off, in ice-water bath
In be further continued for reaction 4 hours.Pour product in buchner funnel vacuum filtration after completion of the reaction, successively with the hydrochloric acid of 1mol/L
Solution, 25% alcoholic solution are respectively rinsed and are once clarified to filtrate.Take out filter cake and be put into vacuum drying oven, temperature is controlled for 60 DEG C
It is dried 24 hours.Then it is by dried composite granule grind into powder, standby after 200 mesh sieves excessively.
Under the pressure of 10MPa, above-mentioned prepared about 5g composite powders are pressed into diameter and are about 13mm, thickness is about
The disk of 2mm, with its electrical conductivity of four-point probe measurment.
About 5.5g dimethylbenzene, 0.5g coupling agents, 14g acrylic resins are sequentially added in 100ml beakers, is stirred with Glass rod
Mix uniform rear ultrasonic disperse 20 minutes, be subsequently adding 8g (aniline:W type strontium ferrites mass ratio is 1:9) polyaniline/W type strontium ferrum
Oxysome composite powder is added in matrix, and stir simultaneously ultrasonic disperse 30 minutes, then pours scattered coating into 50ml
Ball grinder in ball milling, using the spherical tank and steel ball of stainless steel, ratio of grinding media to material is 1:2, rotating speed is 599, and the time is 90 minutes,
Obtained antiradar coatings are taken out into standby.Ball milling can add appropriate dimethylbenzene according to practical situation after terminating and be diluted,
Dilute strength size can smoothly spray spray gun by coating and be defined.
Embodiment 2
First the three-neck flask of 250ml is arranged on magnetic stirring apparatuss, and it is constant with ice-water bath keeping temperature, then to burning
100ml concentration 1mol/L hydrochloric acid solutions, 6.65ml aniline, 15.82gW type strontium W type strontium ferrite (aniline are sequentially added in bottle:W
Type strontium ferrite mass ratio is 2:8) and 0.4g silane couplers, magnetic agitation 30 minutes.Weigh 8.3g (NH4)2S2O8It is placed in cone
In shape bottle, it is dissolved in ice-water bath in the hydrochloric acid of 36ml1mol/L, dissolves (NH after finishing4)2S2O8Hydrochloric acid solution pour into often
Pressure funnel, adjusts the flow velocity of funnel so that (NH4)2S2O8Hydrochloric acid solution dripped off in 40 minutes.After solution is dripped off, in ice
Reaction 4 hours is further continued in water-bath.Pour product in buchner funnel vacuum filtration after completion of the reaction, successively with 1mol/L's
Hydrochloric acid solution, 25% alcoholic solution are respectively rinsed and are once clarified to filtrate.Take out filter cake and be put into vacuum drying oven, controlling temperature is
60 DEG C of dryings 24 hours.Then it is by dried composite granule grind into powder, standby after 200 mesh sieves excessively.
Under the pressure of 10MPa, above-mentioned prepared about 5g composite powders are pressed into diameter and are about 13mm, thickness is about
The disk of 2mm, with its electrical conductivity of four-point probe measurment.
About 5.5g dimethylbenzene, 0.5g coupling agents, 14g acrylic resins are sequentially added in 100ml beakers, is stirred with Glass rod
Mix uniform rear ultrasonic disperse 20 minutes, be subsequently adding 8g (aniline:W type strontium ferrites mass ratio is 2:8) polyaniline/W type strontium ferrum
Oxysome composite powder is added in matrix, and stir simultaneously ultrasonic disperse 30 minutes, then pours scattered coating into 50ml
Ball grinder in ball milling disperse 90 minutes, will obtained antiradar coatings take out it is standby.Ball milling can be according to practical situation again after terminating
Appropriate dimethylbenzene is added to be diluted, dilute strength size can smoothly spray spray gun by coating and be defined.
Embodiment 3
First the three-neck flask of 250ml is arranged on magnetic stirring apparatuss, and it is constant with ice-water bath keeping temperature, then to burning
100ml concentration 1mol/L hydrochloric acid solutions, 6.65ml aniline, 27.12gW type strontium ferrite powder (aniline are sequentially added in bottle:W type strontiums
Ferrite mass ratio is 3:7) and 0.4g silane couplers, magnetic agitation 30 minutes.Weigh 8.3g (NH4)2S2O8It is placed in conical flask
In, it is dissolved in ice-water bath in the hydrochloric acid of 36ml1mol/L, dissolves (NH after finishing4)2S2O8Hydrochloric acid solution pour into normal pressure leakage
Bucket, adjusts the flow velocity of funnel so that (NH4)2S2O8Hydrochloric acid solution dripped off in 30 minutes.After solution is dripped off, in ice-water bath
In be further continued for reaction 4 hours.Pour product in buchner funnel vacuum filtration after completion of the reaction, successively with the hydrochloric acid of 1mol/L
Solution, 25% alcoholic solution are respectively rinsed and are once clarified to filtrate.Take out filter cake and be put into vacuum drying oven, temperature is controlled for 60 DEG C
It is dried 24 hours.Then it is by dried composite granule grind into powder, standby after 200 mesh sieves excessively.
Under the pressure of 10MPa, above-mentioned prepared about 5g composite powders are pressed into diameter and are about 13mm, thickness is about
The disk of 2mm, with its electrical conductivity of four-point probe measurment.
About 5.5g dimethylbenzene, 0.5g coupling agents, 14g acrylic resins are sequentially added in 100ml beakers, is stirred with Glass rod
Mix uniform rear ultrasonic disperse 20 minutes, be subsequently adding 8g (aniline:W type strontium ferrites mass ratio is 3:7) polyaniline/W type strontium ferrum
Oxysome composite powder is added in matrix, and stir simultaneously ultrasonic disperse 30 minutes, then pours scattered coating into 50ml
Ball grinder in ball milling disperse 90 minutes, will obtained antiradar coatings take out it is standby.Ball milling can be according to practical situation again after terminating
Appropriate dimethylbenzene is added to be diluted, dilute strength size can smoothly spray spray gun by coating and be defined.
Embodiment 4
First the three-neck flask of 250ml is arranged on magnetic stirring apparatuss, and it is constant with ice-water bath keeping temperature, then to burning
100ml concentration 1mol/L hydrochloric acid solutions, 6.65ml aniline, 61.02gW type strontium ferrite powder (aniline are sequentially added in bottle:W type strontiums
Ferrite mass ratio is 4:6) and 0.4g silane couplers, magnetic agitation 30 minutes.Weigh 8.3g (NH4)2S2O8It is placed in conical flask
In, it is dissolved in ice-water bath in the hydrochloric acid of 36ml1mol/L, dissolves (NH after finishing4)2S2O8Hydrochloric acid solution pour into normal pressure leakage
Bucket, adjusts the flow velocity of funnel so that (NH4)2S2O8Hydrochloric acid solution dripped off in 40 minutes.After solution is dripped off, in ice-water bath
In be further continued for reaction 4 hours.Pour product in buchner funnel vacuum filtration after completion of the reaction, successively with the hydrochloric acid of 1mol/L
Solution, 25% alcoholic solution are respectively rinsed and are once clarified to filtrate.Take out filter cake and be put into vacuum drying oven, temperature is controlled for 60 DEG C
It is dried 24 hours.Then it is by dried composite granule grind into powder, standby after 200 mesh sieves excessively.
Under the pressure of 10MPa, above-mentioned prepared about 5g composite powders are pressed into diameter and are about 13mm, thickness is about
The disk of 2mm, with its electrical conductivity of four-point probe measurment.
About 5.5g dimethylbenzene, 0.5g coupling agents, 14g acrylic resins are sequentially added in 100ml beakers, is stirred with Glass rod
Mix uniform rear ultrasonic disperse 20 minutes, be subsequently adding 8g (aniline:W type strontium ferrites mass ratio is 4:6) polyaniline/W type strontium ferrum
Oxysome composite powder is added in matrix, and stir simultaneously ultrasonic disperse 30 minutes, then pours scattered coating into 50ml
Ball grinder in ball milling disperse 90 minutes, will obtained antiradar coatings take out it is standby.Ball milling can be according to practical situation again after terminating
Appropriate dimethylbenzene is added to be diluted, dilute strength size can smoothly spray spray gun by coating and be defined.
Under the pressure of 10MPa, above-mentioned prepared about 5g composite powders are pressed into diameter and are about 13mm, thickness is about
The disk of 2mm, with its electrical conductivity of four-point probe measurment.
Accompanying drawing 3 is by the polyaniline of single polyaniline and four kinds of different proportions/W type strontium ferrite composite granule (aniline and W
Type strontium ferrite is 1 in mass ratio:9,2:8,3:7,4:6 are obtained) under the pressure of 10MPa, a diameter of 13mm is pressed into, thickness is about
Its electrical conductivity to be surveyed after the disk of 2mm, be as a result labeled as A, B, C, D, E successively.As can be seen from Figure, the polyphenyl of one-component
Amine conductivity is relatively higher, as the electrical conductivity of the increase composite powder material of W type strontium ferrite incorporations is gradually lowered, when
It is 3 with aniline and W type strontium ferrites mass ratio:7 when carrying out home position polymerization reaction, and gained polyaniline is answered with W type strontium ferrites
Condensation material electrical conductivity fall is maximum.
It is 180mm × 180mm aluminium sheets that absorbing property tests adopted spray coating plate, and thickness is 1mm, spraying plate surface elder generation
With sand papering, after totally dried with washes of absolute alcohol it is standby；Above-mentioned same surface is carried out in the nickel foil of 50mm × 50mm
It is used for scanning electron microscopic observation after process.
Spray equipment compresses spray gun using air, and the shower nozzle aperture of spray gun is 1.5mm, and spray pressure is 8MPa, will prepare
Good antiradar coatings take out and pour in spray tank, are equably sprayed on processed good aluminium sheet, and spraying finishes rear drying at room temperature
48 hours, 40 DEG C of temperature is set in being then placed in vacuum drying oven and continues to be dried 48 hours, repeatedly spray to control coating layer thickness
Between 2.0mm-2.5mm, the sheet material after the completion of being dried to having sprayed carries out the test of resistivity and absorbing property.Accompanying drawing 4 is
The absorbing property of the polyaniline of different quality ratio/W type strontium ferrite absorbent, A, B, C, D, E, F are aniline and W type strontiums respectively
Ferrite mass ratio is 1:9、2:8、3:7、4:6th, single W types strontium ferrite and single doped hydrochloride polyaniline are inhaled as absorbent
The absorbing property of ripple coating.It can be seen that the microwave absorbing coating of A samples in the effective absorption frequency range less than -10dB is
10.7-13.3GHz, effective absorption band width have 2.6GHz, and maximum absorbance reaches -15.3dB.The microwave absorbing coating of B samples is low
Be 12-14.1GHz in effective absorption frequency range of -10dB, effective absorption band width has a 2.1GHz, maximum absorbance up to -
13.5dB.The microwave absorbing coating of C sample less than -10dB effective absorption frequency range be 12.85-16.68GHz, effective absorption band
Width has 3.83GHz, and maximum absorbance reaches -16.63dB.The microwave absorbing coating of D samples less than effective absorption frequency range of -10dB is being
12.4-15.4GHz, effective absorption band width have 3GHz, and maximum absorbance reaches -14.79dB, and the microwave absorbing coating of E samples is low
Be 6.1-8.0GHz in effective absorption frequency range of -10dB, effective absorption band width has a 1.9GHz, maximum absorbance up to -
14.56dB.The microwave absorbing coating of F samples less than -10dB effective absorption frequency range be 10.06-11.18GHz, effective absorption band
Width has 1.12GHz, and maximum absorbance reaches -11.16dB.A, B, C, D sample compared with the absorbent properties of E, F sample, wave absorbtion
Can not only increase, and frequency range is also widened.
Claims (3)
1. the preparation method of a kind of polyaniline/W type strontium ferrite composites, it is characterised in that comprise the steps：
(1) 10.18g～61.02g W type strontium ferrite powder, 0.4g silane couplers are weighed respectively, measure 100ml respectively dense
It is that 1mol/L hydrochloric acid and 6.65ml aniline liquid are put in three-neck flask to spend, and after mix homogeneously, is stirred for 20～30 minutes；
(2) 8.3g (NH are weighed4)2S2O8It is placed in conical flask, the hydrochloric acid solution that 36ml concentration is 1mol/L is dissolved in ice-water bath
In, adjust the flow velocity of funnel so that (NH4)2S2O8Hydrochloric acid solution dripped off in 30～40 minutes, after dripping off, in ice-water bath
It is further continued for reaction 4～10 hours；
(3) pour product in buchner funnel vacuum filtration after completion of the reaction, successively with hydrochloric acid solution and alcohol washing solution extremely
Filtrate is clarified, and takes out filter cake and is put into vacuum drying oven, be dried 20～24 hours, then answer dried at 60 DEG C after filtration
Close powder body grind into powder to sieve to obtain target product.
2. a kind of preparation method of polyaniline/W type strontium ferrite composites as claimed in claim 1, it is characterised in that institute
The preparation method for stating W type strontium ferrite powder is：
Pure Sr (NO will be analyzed3)2、Fe(NO3)3·9H2O、Co(NO3)2·6H2O presses SrCo2Fe16O27Stoichiometric proportion is completely dissolved
In a beaker for filling distilled water, a certain amount of citric acid is added as complexant, wherein：Metal ion is rubbed with citric acid
Your ratio is 1:1, be sufficiently stirred for being completely dissolved which, be added dropwise over ammonia, pH value is adjusted to neutrality, stirred under 80 DEG C of water bath conditions
Mix to solution and become colloidal sol, then colloidal sol is dried, obtain the xerogel of porous, be ground into powder, then powder is placed on
Calcine in crucible, naturally cool to room temperature afterwards.
3. a kind of polyaniline/W type strontium ferrite composites as claimed in claim 1 as absorbent on antiradar coatings
Using.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107792889A (en) * | 2017-11-02 | 2018-03-13 | 桂林电子科技大学 | A kind of strontium cobalt W type hexad ferrite materials and preparation method thereof |
| CN108607606A (en) * | 2018-03-29 | 2018-10-02 | 上海大学 | Biconjugate polyalcohol catalyst system with photocatalytic water performance |
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| CN108607606A (en) * | 2018-03-29 | 2018-10-02 | 上海大学 | Biconjugate polyalcohol catalyst system with photocatalytic water performance |
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